The Vertebreaker (since banned by the WWE). Description stolen from some Angelfire site:
The victim is behind the attacker. The attacker places the victim's head between their legs and hooks both their arms. The attacker turns around so the victim is now in front of the attacker facing the same direction, at the same time, the victim ducks down and sticks their head between the victim's legs and stands up while still having the arms hooked. The victim is lifted up so they are now upside down, the attacker suspends the victim by keeping their arms trapped. The attacker holds the victim's arms and grabs the victim's legs. The attacker sits down, dropping the victim on their head/back of the neck.
It's one of the most convoluted yet brutal-looking maneuvers I've ever seen, and the great part about it is that it was originally done by a female wrestler in Japan (originally called the "Kudoh Driver").
― Nate Patrin (Nate Patrin), Sunday, 9 March 2003 02:03 (twenty-three years ago)